Is this address validator free?

Yes. Paste an address, read the result, no signup and no card. It runs in your browser against public data and nothing you paste is stored.

What counts as an undeliverable address?

Usually a missing unit or apartment number, a street that does not exist at that postal code, or a postal code that belongs to a different city. The tool names which one it is.

Does checking an address here change anything in my Shopify store?

No. This is a one-off lookup for a single address. It does not connect to your store, read your orders or write anything back.

Can I check every order automatically instead of one at a time?

That is what the Tacey app does. It checks the shipping address the moment an order is placed and tags anything it cannot confirm in your Shopify admin, and the customer can correct it themselves on the order status page.

Does a failed check mean I should not ship the order?

No. It means look at it. Tacey never holds, pauses or blocks a shipment because of an address flag. The decision stays with you.

Shopify Address Validator - Free, No Signup

What this tool does

The same validator that runs inside Tacey, available to test one address at a time

This is the same address-deliverability check that fires on every order inside Tacey. Paste a shipping address from a problem order or a customer support ticket, get carrier-grade deliverability, formatted-correctly version, AI reasoning on what's wrong, and the suggested fix. Use it to vet edge cases before pushing fixes back into your store.

How to use it

Validate one address

1Paste the country, ZIP / postal code, street address, city, and state. Use the format the customer entered, not the cleaned-up version.
2Click Validate. The check runs in 1-2 seconds.
3Read the verdict: deliverable / not deliverable / formatting issue. The result includes confidence score, AI reasoning, and the recommended corrected address if a fix is possible.
4Compare your input vs the suggested fix side-by-side. Apply the fix to the order in Shopify if needed.

Merchant tips

What you'll catch using this tool

Apartment numbers in the wrong field (line 1 vs line 2). This is the #1 carrier-correction-fee trigger - the package usually delivers but the carrier charges $25.50 (FedEx) or up to $25 (UPS) for the format mismatch.

Street suffix mismatches: 'Street' vs 'St', 'Avenue' vs 'Ave', 'Court' vs 'Ct'. Carriers normalize these but bill the merchant for the correction.

Missing unit numbers in multi-unit buildings. The validator catches when an address resolves to a multi-unit building but no apartment / unit / suite was provided.

International postal-format mismatches. The validator covers 195 countries with country-specific format rules, including non-Latin script (Japanese, Chinese, Korean, Arabic).

When to reach for this

When to reach for this tool

A customer escalation

Customer says "my address is right" but the package returned. Paste their address - see exactly what's missing.

Onboarding due diligence

Run a sample of recent orders before you install Tacey to see how many would have flagged.

Wholesale / B2B addresses

B2B addresses bypass most checkout autocomplete. Run the validator on suspicious wholesale orders before fulfilling.

What you get out

Verdict, confidence, AI reasoning, and the suggested fix

A clear verdict (deliverable / formatting issue / undeliverable), a confidence score 0-100, an AI reasoning narrative explaining what was checked, and the recommended corrected address if a fix exists. Three uses per IP per day on the free tier - install Tacey for unlimited validation on every order automatically.

Frequently asked questions

Is this address validator free?: Yes. Paste an address, read the result, no signup and no card. It runs in your browser against public data and nothing you paste is stored.
What counts as an undeliverable address?: Usually a missing unit or apartment number, a street that does not exist at that postal code, or a postal code that belongs to a different city. The tool names which one it is.
Does checking an address here change anything in my Shopify store?: No. This is a one-off lookup for a single address. It does not connect to your store, read your orders or write anything back.
Can I check every order automatically instead of one at a time?: That is what the Tacey app does. It checks the shipping address the moment an order is placed and tags anything it cannot confirm in your Shopify admin, and the customer can correct it themselves on the order status page.
Does a failed check mean I should not ship the order?: No. It means look at it. Tacey never holds, pauses or blocks a shipment because of an address flag. The decision stays with you.

This is a snapshot. Tacey runs it on every order.

The tool answers one question, once. The app answers it continuously, on the thank you page and order status page your customer already has open.

Continuous

Every order checked the moment it lands, not when you remember to run a calculator.

Automatic

A bad address is corrected by the customer before your warehouse picks it.

Provable

Every change written to a record with what it cost and who asked for it.

Install on Shopify

Address Validator

The same validator that runs inside Tacey, available to test one address at a time

Validate one address

What you'll catch using this tool

When to reach for this tool

Verdict, confidence, AI reasoning, and the suggested fix

Frequently asked questions

This is a snapshot. Tacey runs it on every order.

Continuous

Automatic

Provable

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